Affine-Goldstone/quartet-metric gravity: emergent vs. existent

TL;DR

This paper explores a gravity model based on affine-Goldstone symmetry breaking, which leads to an effective field theory including dark substances alongside the tensor graviton, and discusses potential extensions beyond the Planck scale.

Contribution

It introduces a nonlinear affine-Goldstone gravity model derived from symmetry breaking, linking it to an effective theory with dark components and outlining future directions beyond the Planck scale.

Findings

Model justifies an effective field theory of quartet-metric gravity

Incorporates gravitational dark substances alongside the tensor graviton

Suggests pathways for extending the model beyond the Planck scale

Abstract

As a group-theoretic foundation of gravity, it is considered an affine-Goldstone nonlinear model based upon the nonlinear realization of the global affine symmetry spontaneously broken at the Planck scale to the Poincare symmetry. It is shown that below this scale the model justifies and elaborates an earlier introduced effective field theory of the quartet-metric gravity incorporating the gravitational dark substances emerging in addition to the tensor graviton. The prospects for subsequent going beyond the nonlinear model above the Planck scale are indicated.